Defined SFTP file copy on trigger example. First working SFTP session.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Temporarely disabled privacy of session value in Connection class.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Included libssh2_sftp.h

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>